Original 4GB CF Card Memory Cards UDMA High Speed CompactFlash

Great for my trail cam.

Most excellent.

Fast ship great product

**Update** The card no long works, I barely used it after the test for the review, and when I went to use it again, my reader just blinks forever and the card is not acknowledged. I tried with 2 different readers which have no problems with all of my other cards. **Previous Review** Write speeds were about 12mb/s when flashing a disk image, I am using it in an CF to IDE adapter, it is as fast to read as my Sandisk Extreme III that this is inspired by.

I have a Canon digital Rebel DSLR that takes compact flash cards- which are getting harder to find, as the SD cards have taken over. I have always used SanDisk Ultra II compact flash cards, wanting to stay with a name brand. This card, though, has blown me away. Not only does it have mega-capacity, but it really is fast. My camera displays the pic taken on the rear screen, while the pic is being processed into memory on the card. I can tell how fast a card is, by how long the pic is on the rear screen. This card is amazingly fast, especially with its huge capacity- by all rights it should take longer to process the pic, as it has so much capacity- yet it is faster than my 1GB SanDisk card, Very impressive. Also, I can review all pics I've taken by pressing the play button- and seeing how long it takes the camera from being "busy" to displaying the pics. Once again, this card shines. A very welcome addition to my compact card lineup. Five stars all the way.

The 4GB CompactFlash memory card feels like a step back in time, given the more modern storage options available today. However, understanding that some professional cameras still utilize this format, I saw the value in having one as a backup. Four gigabytes isn't a substantial amount of space, especially for shooting high-quality RAW images. It's quite limited in that regard. In a pinch, it's better than not being able to take photos at all, but it's not ideal for extensive photography sessions. The card's read and write speed is acceptable, though not as fast as my SD card. This aspect didn't bother me much since I don't rely heavily on this card. It's more about having an extra option available. The functionality is there—it works as intended, and that's a key point. Pricing would be a significant factor in my overall satisfaction. If the card were expensive, I might feel differently, but as a relatively low-cost item, it's easier to view it favorably. I'm torn between a three and a four-star rating. My practical side says three, considering the limited storage capacity and somewhat outdated technology. But there's an element of appreciation for its reliability and function, which leans towards a four. Balancing these perspectives, I'll settle on a three-star rating, recognizing its utility despite its limitations.

The Zhongsir 4GB "Extreme" carries a VPG-20 marking, which is intended to be a guaranteed minimum WRITE speed of 20MB/s, in order to support video recording. It didn't come close. The absolute best READ speed I could get out of it was 19.7MB/s, and that was connected over ATA with UDMA enabled. A more realistic connection over USB3.0 in an adapter that I know to be capable of more, was only around 16MB/s, again that was for reading, the writes were slower. The description disagrees with itself, variably calling it a "VPG-65" card, but also "133x". When speeds are listed as "x", it represents the read speed as a multiplier of the original CD-ROM speed of 150KB/s, and wouldn't you know it, 133 x 150KB/s = 19.95MB/s. Almost exactly what this card tops out at with a UDMA connection. If you're expecting it to be a competitor for a genuine "Extreme" card from the maker that originated the moniker and color scheme, (or the fast cards from the other maker whose rainbow color scheme is on the back) expect to be disappointed. It can't match an Extreme III from 2004, or get even half-way to an Extreme IV from 2006, let alone the current versions. It does check out for capacity, and it is just barely acceptable for a 133x card, but until they change the sticker on the card to represent the true specs, I can't recommend it if you actually need a fast, modern card.

Compact Flash card were popular in older digital cameras, before SDs became more of the standard. This worked fine in my old Nikon D700 camera. Was able to take photos, reformat the CF card and copy photos off the card to my computer. While the 4GB isn't much capacity for today's megapixel cameras, it's a decent amount for older 12MP cameras. I compared it to my existing SanDisk 8GB CF card and this looks like a close copy visually. Just glad it works and is great to have extra memory cards. 5 stars.

Qualité très bonne pour le prix,

Bought this card and brought it out on vacation, all the photos were erased that we toke because the card is fake and cheap. Please don’t buy, it works but not for long.

Never worked in any camera. Only computer could read and format it but no camera would read it. Needed it for a camera so worthless product